we are learning more about the navy s.e.a.l. who died in a mission to rescue an american doctor held captive in afghanistan. . >> reporter: he died doing what he dreamed about since middle school and his last operation was a success. 28-year-old nicholas check from the elite s.e.a.l. team six, the lone u.s. casualty in the mission that rescued dr. joseph from his cappers in afghanistan. tony said he dreaded this day. still -- >> i never thought that anything like that could happen to him. he was always smarter, faster, always, you know, he was always so dedicated. and you know, just blew my mind when it happened. >> the played football and wrestled with nick in middle school at norwin high school outside of pittsburgh. he and another teammate, now the assistant principal at norwin remember him as a no-nonsense kid that never wanted to be anything but a navy s.e.a.l. >> what when you went up against him in practice what was it like. >> when you got tired in the end, he didn't slow down or give in. >> her he was known as a good wr